Home / 669,686.40-1,005,307.20-385,603.20

Finding the Fourth Proportional to 669,686.40, 1,005,307.20 and 385,603.20

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Solution

The fourth proportional to 669,686.40, 1,005,307.20 and 385,603.20 is: 578,852.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,686.40 : 1,005,307.20 = 385,603.20 : x
  2. Step 2: Convert to fraction form
    669,686.40/1,005,307.20 = 385,603.20/x
  3. Step 3: Cross multiply
    669,686.40x = 1,005,307.20 × 385,603.20
  4. Step 4: Simplify right side
    669,686.40x = 387,649,673,303.04
  5. Step 5: Solve for x
    x = 387,649,673,303.04/669,686.40
  6. Step 6: Final answer
    x = 578,852.54

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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.