Home / 476,928,001.20-715,392,001.80-390,763,700.40

Finding the Fourth Proportional to 476,928,001.20, 715,392,001.80 and 390,763,700.40

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Solution

The fourth proportional to 476,928,001.20, 715,392,001.80 and 390,763,700.40 is: 586,145,550.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,928,001.20 : 715,392,001.80 = 390,763,700.40 : x
  2. Step 2: Convert to fraction form
    476,928,001.20/715,392,001.80 = 390,763,700.40/x
  3. Step 3: Cross multiply
    476,928,001.20x = 715,392,001.80 × 390,763,700.40
  4. Step 4: Simplify right side
    476,928,001.20x = 279,549,225,859,931,424
  5. Step 5: Solve for x
    x = 279,549,225,859,931,424/476,928,001.20
  6. Step 6: Final answer
    x = 586,145,550.60

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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.