Home / 385,547.40-578,321.10-319,192.20

Finding the Fourth Proportional to 385,547.40, 578,321.10 and 319,192.20

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Solution

The fourth proportional to 385,547.40, 578,321.10 and 319,192.20 is: 478,788.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,547.40 : 578,321.10 = 319,192.20 : x
  2. Step 2: Convert to fraction form
    385,547.40/578,321.10 = 319,192.20/x
  3. Step 3: Cross multiply
    385,547.40x = 578,321.10 × 319,192.20
  4. Step 4: Simplify right side
    385,547.40x = 184,595,584,215.42
  5. Step 5: Solve for x
    x = 184,595,584,215.42/385,547.40
  6. Step 6: Final answer
    x = 478,788.30

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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.