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Finding the Fourth Proportional to 510,065.40, 763,931.70 and 260,455.80

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Solution

The fourth proportional to 510,065.40, 763,931.70 and 260,455.80 is: 390,088.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,065.40 : 763,931.70 = 260,455.80 : x
  2. Step 2: Convert to fraction form
    510,065.40/763,931.70 = 260,455.80/x
  3. Step 3: Cross multiply
    510,065.40x = 763,931.70 × 260,455.80
  4. Step 4: Simplify right side
    510,065.40x = 198,970,442,068.86
  5. Step 5: Solve for x
    x = 198,970,442,068.86/510,065.40
  6. Step 6: Final answer
    x = 390,088.10

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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.