Home / 745,643.68-1,028,925.08-418,931.20

Finding the Fourth Proportional to 745,643.68, 1,028,925.08 and 418,931.20

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Solution

The fourth proportional to 745,643.68, 1,028,925.08 and 418,931.20 is: 578,089.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,643.68 : 1,028,925.08 = 418,931.20 : x
  2. Step 2: Convert to fraction form
    745,643.68/1,028,925.08 = 418,931.20/x
  3. Step 3: Cross multiply
    745,643.68x = 1,028,925.08 × 418,931.20
  4. Step 4: Simplify right side
    745,643.68x = 431,048,818,474.50
  5. Step 5: Solve for x
    x = 431,048,818,474.50/745,643.68
  6. Step 6: Final answer
    x = 578,089.55

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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.