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Finding the Fourth Proportional to 718,670.64, 991,810.80 and 412,842.72

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Solution

The fourth proportional to 718,670.64, 991,810.80 and 412,842.72 is: 569,748.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,670.64 : 991,810.80 = 412,842.72 : x
  2. Step 2: Convert to fraction form
    718,670.64/991,810.80 = 412,842.72/x
  3. Step 3: Cross multiply
    718,670.64x = 991,810.80 × 412,842.72
  4. Step 4: Simplify right side
    718,670.64x = 409,461,868,397.38
  5. Step 5: Solve for x
    x = 409,461,868,397.38/718,670.64
  6. Step 6: Final answer
    x = 569,748.99

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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.