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Finding the Fourth Proportional to 666,937.35, 920,904.27 and 615,931.47

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Solution

The fourth proportional to 666,937.35, 920,904.27 and 615,931.47 is: 850,475.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,937.35 : 920,904.27 = 615,931.47 : x
  2. Step 2: Convert to fraction form
    666,937.35/920,904.27 = 615,931.47/x
  3. Step 3: Cross multiply
    666,937.35x = 920,904.27 × 615,931.47
  4. Step 4: Simplify right side
    666,937.35x = 567,213,920,750.38
  5. Step 5: Solve for x
    x = 567,213,920,750.38/666,937.35
  6. Step 6: Final answer
    x = 850,475.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.