Home / 1,290,654,438.40-1,935,981,657.60-429,011,430.40

Finding the Fourth Proportional to 1,290,654,438.40, 1,935,981,657.60 and 429,011,430.40

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Solution

The fourth proportional to 1,290,654,438.40, 1,935,981,657.60 and 429,011,430.40 is: 643,517,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,654,438.40 : 1,935,981,657.60 = 429,011,430.40 : x
  2. Step 2: Convert to fraction form
    1,290,654,438.40/1,935,981,657.60 = 429,011,430.40/x
  3. Step 3: Cross multiply
    1,290,654,438.40x = 1,935,981,657.60 × 429,011,430.40
  4. Step 4: Simplify right side
    1,290,654,438.40x = 830,558,260,155,138,944
  5. Step 5: Solve for x
    x = 830,558,260,155,138,944/1,290,654,438.40
  6. Step 6: Final answer
    x = 643,517,145.60

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.