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Finding the Fourth Proportional to 978,319.59, 1,350,274.65 and 634,581.51

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Solution

The fourth proportional to 978,319.59, 1,350,274.65 and 634,581.51 is: 875,848.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,319.59 : 1,350,274.65 = 634,581.51 : x
  2. Step 2: Convert to fraction form
    978,319.59/1,350,274.65 = 634,581.51/x
  3. Step 3: Cross multiply
    978,319.59x = 1,350,274.65 × 634,581.51
  4. Step 4: Simplify right side
    978,319.59x = 856,859,316,387.44
  5. Step 5: Solve for x
    x = 856,859,316,387.44/978,319.59
  6. Step 6: Final answer
    x = 875,848.07

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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.