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Finding the Fourth Proportional to 615,465.40, 921,815.70 and 615,465.40

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Solution

The fourth proportional to 615,465.40, 921,815.70 and 615,465.40 is: 921,815.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,465.40 : 921,815.70 = 615,465.40 : x
  2. Step 2: Convert to fraction form
    615,465.40/921,815.70 = 615,465.40/x
  3. Step 3: Cross multiply
    615,465.40x = 921,815.70 × 615,465.40
  4. Step 4: Simplify right side
    615,465.40x = 567,345,668,526.78
  5. Step 5: Solve for x
    x = 567,345,668,526.78/615,465.40
  6. Step 6: Final answer
    x = 921,815.70

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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.