Home / 644,853.16-889,621.32-402,715.36

Finding the Fourth Proportional to 644,853.16, 889,621.32 and 402,715.36

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Solution

The fourth proportional to 644,853.16, 889,621.32 and 402,715.36 is: 555,574.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,853.16 : 889,621.32 = 402,715.36 : x
  2. Step 2: Convert to fraction form
    644,853.16/889,621.32 = 402,715.36/x
  3. Step 3: Cross multiply
    644,853.16x = 889,621.32 × 402,715.36
  4. Step 4: Simplify right side
    644,853.16x = 358,264,170,147.48
  5. Step 5: Solve for x
    x = 358,264,170,147.48/644,853.16
  6. Step 6: Final answer
    x = 555,574.81

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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.