Home / 989,308.40-1,483,962.60-390,070.40

Finding the Fourth Proportional to 989,308.40, 1,483,962.60 and 390,070.40

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Solution

The fourth proportional to 989,308.40, 1,483,962.60 and 390,070.40 is: 585,105.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,308.40 : 1,483,962.60 = 390,070.40 : x
  2. Step 2: Convert to fraction form
    989,308.40/1,483,962.60 = 390,070.40/x
  3. Step 3: Cross multiply
    989,308.40x = 1,483,962.60 × 390,070.40
  4. Step 4: Simplify right side
    989,308.40x = 578,849,884,967.04
  5. Step 5: Solve for x
    x = 578,849,884,967.04/989,308.40
  6. Step 6: Final answer
    x = 585,105.60

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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.